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  1. #1
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    07 RXP A/F with x charger

    hey i need help 07 rxp on my ski i just put a x charger with 38 injector and i need the a/f


  2. #2
    dnielsen's Avatar
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    Lean.....

  3. #3
    MacDaddy_rxpx's Avatar
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    need 42s..

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    PHONE BOY2369's Avatar
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    Quote Originally Posted by raul466 View Post
    hey i need help 07 rxp on my ski i just put a x charger with 38 injector and i need the a/f
    You will need a set of 42s if you are still running the stock ic if not get a rrfpr with the 38s . You are way too lean with the 38s

  5. #5
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    Quote Originally Posted by calendine2369 View Post
    You will need a set of 42s if you are still running the stock ic if not get a rrfpr with the 38s . You are way too lean with the 38s
    am using a x intecooler but how is the a
    /f a have 42 but is going to be reach

  6. #6
    dnielsen's Avatar
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    With the X charger and the X intercooler and a set of 42s you should be good on your AFRs. With the stock 215 intercooler (internal) the intercooler is more restrictive thus reducing the amount of boost to the cylinders, with this setup the 38s will likely still be a little lean so thus the need for the RRFPR so you can fine tune your AFRs by adding a little fuel throughout the RPM range but more importantly at WOT. When you start fooling around with the boost and injectors its wise to invest in a AFR monitoring system such as the Dynotune LC1. There are many of these out on the market and are simple to install wirh the exception of installing the bung hole for the O2 sensor. Do a search on the bung hole install so you'll have a better idea of how and what needs to be done. Your AFRs need to running at around 11.8 to 11.9 at WOT to be safe. There are a few that run these a little leaner but when doing so you better be careful and know what your doing...

  7. #7
    monaroman76's Avatar
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    Wrong. You will also need a RRFPR along with the 42's to get your a/f correct.. Don't be riding the ski with the x charger and x I/c and stock fueling... You are wayyyy lean.

  8. #8
    b_dolla44's Avatar
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    Way way way lean!

  9. #9
    WOT 88's Avatar
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    Quote Originally Posted by monaroman76 View Post
    Wrong. You will also need a RRFPR along with the 42's to get your a/f correct.. Don't be riding the ski with the x charger and x I/c and stock fueling... You are wayyyy lean.
    Quote Originally Posted by b_dolla44 View Post
    Way way way lean!
    + 1, your ECU is mapped for the 38's ...need rrfpr

  10. #10
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    Quote Originally Posted by WOT 88 View Post
    + 1, your ECU is mapped for the 38's ...need rrfpr
    am running open loop the temperature is cool thats way i was thinking with 42 is reach, thanks that to all for the help...

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